Generating 1000s of objects are really slow, how to optimize it?
I figured out that generating lots of objects is not the way to go. Instead we should always think of ways to merge the objects into a single object, however still having all the data and values needed.

In case of VOXEL and Magica Voxel or Drububu, my solution is to deal with Position, Color, to represent a Box of Voxel, and instance it thousands of times, however to always keep everything as a single object.